If you’ve ever wanted to stand exactly where a possessed doll, a dream-invading burn victim, or a hedge-lurking masked murderer once terrorized a fictional family, welcome to your new Halloween itinerary. Los Angeles isn’t just the entertainment capital of the world — it’s basically one giant, sun-bleached backlot dressed up as Anywhere, USA, which means the city is quietly stuffed with Horror Movie Locations in Los Angeles that most Angelenos drive past every single day without ever realizing they’re passing the site of a fictional massacre. Instead of shelling out for a corn maze or waiting in line for a haunted hayride this year, grab a few friends, charge your…